The paper deals with the comparative analysis of vital records on cardiovascular mortality among Japanese and both white and non-white population of the United States for the years of 1950, 1955 and 1960. The comparative analysis is carried out by calculating the age-sex-ad justed death rates for four selected cardiovascular diseases. Very high death rates from arteriosclerotic and degenerative heart disease with low rates from vascular lesions of the central nervous system are noted among the American populationn while the situation is reverse among the Japanese. Other notable results are presented. Considerable factors responsible to the results of the analysis are discussed. Results of the study is presented also in the recent issue of the Bulletin of the Heart Institute, Japan.